angeles. >>> his job was to protect the president. tonight we hear from one of the last surviving secret service agents in dallas the day jfk was assassinated. >>> out with the old, in with the new. how rio is getting ready for the 2016 olympics. >>> thanksgiving a few days away, that means christmas can't be far >> big turnout for a demolition in rio. crews destroyed part of a bridge that connects the city with the suburbs, part of revitalization efforts as rio prepares to host the 2016 olympic games. one of the projects under way to give the city a bit of a facelift before the summer games. >>> we're getting ready for christmas, the capitol christmas tree is making its way to d.c., the 88-foot spruce is selected from a national park in washington state. today that tree made a stop at joint base andrews in prince georges county. it will be in a position 10:00. the season of giving is upon us and nurses at med star georgetown hospital have been collecting food for those in need. volunteers tell us this year they've gotten more canned